Revert "_InputArray/_OutputArray destructors are temporary made non-virtual. Please, restore it after 2.4.3"

This reverts commit 4be7619ce4.

cmake/OpenCVCompilerOptions.cmake

@@ -61,7 +61,7 @@ if(CMAKE_COMPILER_IS_GNUCXX)
   add_extra_compiler_option(-W)
   add_extra_compiler_option(-Wall)
   add_extra_compiler_option(-Werror=return-type)
-  #add_extra_compiler_option(-Werror=non-virtual-dtor)
+  add_extra_compiler_option(-Werror=non-virtual-dtor)
   add_extra_compiler_option(-Werror=address)
   add_extra_compiler_option(-Werror=sequence-point)
   add_extra_compiler_option(-Wformat)

modules/core/include/opencv2/core/core.hpp

@@ -1340,7 +1340,7 @@ public:
     virtual int channels(int i=-1) const;
     virtual bool empty() const;
 
-    /*virtual*/ ~_InputArray();
+    virtual ~_InputArray();
 
     int flags;
     void* obj;
@@ -1402,7 +1402,7 @@ public:
     virtual void release() const;
     virtual void clear() const;
 
-    /*virtual*/ ~_OutputArray();
+    virtual ~_OutputArray();
 };
 
 typedef const _InputArray& InputArray;